CVE-2024-31400Network attack vector

Information disclosure through forwarded-mail data retention

Published Jun 11, 2024 · Updated Nov 8, 2024

Information disclosure in Cybozu Garoon 5.0.0 through 5.15.0 allows remote attackers to leave unintended data in forwarded mail. Cybozu has not disclosed which mail-processing locus or incorrect operation causes the data to remain in a forwarded message. Exploitation requires user interaction during mail forwarding, and the resulting disclosure is limited to data unintentionally retained in that message.

CVSS severity4.3
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Cybozu Garoon 5.0.0 through 5.15.0 allows remote attackers to leave unintended data in forwarded mail. Cybozu has not disclosed which mail-processing locus or incorrect operation causes the data to remain in a forwarded message. Exploitation requires user interaction during mail forwarding, and the resulting disclosure is limited to data unintentionally retained in that message.

The record

CVE
CVE-2024-31400
Published
Jun 11, 2024
Updated
Nov 8, 2024
Vendor
Cybozu
Product
Garoon
Classifications
CWE-922, CWE-201
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 11, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 8, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.0.0 to 5.15.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Cybozu · Garoonversion=5.0.0 to 5.15.0

Published CVSS scores

4.3JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-922Insecure Storage of Sensitive Information
CWE-201Insertion of Sensitive Information Into Sent Data

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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